Synthesis of C(3) SCF-Substituted Pyrrolidinoindoline by P/P Redox Catalysis Using CFSOCl as Electrophilic CFS Reagent.

This work reports a method for the catalytic synthesis of C(3) SCF-substituted pyrrolidinindoline using a small-ring organophosphorus-based catalyst and a hydrosilane reductant, with trifluoromethanesulfonyl chloride as the electrophilic SCF reagent. This method can drive the conversion of tryptamine to the C(3) SCF-substituted pyrrolidine indoline. The readily available, inexpensive trifluoromethanesulfonyl chloride could be activated as an electrophilic SCF source by P/P redox catalysis and could efficiently participate in the reaction of tryptamines, thus providing various substituted C(3) SCF-substituted pyrrolidinoindoline in moderate to excellent yields. This presented strategy features a broad substrate scope, and the structure has value for in-depth research.